Measurement of the relaxation time of hot electrons in laser-solid interaction at relativistic laser intensities

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The authors have measured the relaxation time of hot electrons in short pulse laser-solid interactions using a picosecond time-resolved x-ray spectrometer and a time-integrated electron spectrometer. Employing laser intensities of 10{sup 17}, 10{sup 18}, and 10{sup 19} W/cm{sup 2}, they find increased laser coupling to hot electrons as the laser intensity becomes relativistic and thermalization of hot electrons at timescales on the order of 10 ps at all laser intensities. They propose a simple model based on collisional coupling and plasma expansion to describe the rapid relaxation of hot electrons. The agreement between the resulting K{sub {alpha}} time-history from this ... continued below

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Chen, H; Shepherd, R; Chung, H K; Dyer, G; Faenov, A; Fournier, K B et al. August 22, 2006.

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The authors have measured the relaxation time of hot electrons in short pulse laser-solid interactions using a picosecond time-resolved x-ray spectrometer and a time-integrated electron spectrometer. Employing laser intensities of 10{sup 17}, 10{sup 18}, and 10{sup 19} W/cm{sup 2}, they find increased laser coupling to hot electrons as the laser intensity becomes relativistic and thermalization of hot electrons at timescales on the order of 10 ps at all laser intensities. They propose a simple model based on collisional coupling and plasma expansion to describe the rapid relaxation of hot electrons. The agreement between the resulting K{sub {alpha}} time-history from this model with the experiments is best at highest laser intensity and less satisfactory at the two lower laser intensities.

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PDF-file: 15 pages; size: 0.4 Mbytes

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  • Journal Name: Physical Review E, vol. 76, no. 5, November 1, 2007, pp. 056402; Journal Volume: 76; Journal Issue: 5

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  • Report No.: UCRL-JRNL-223961
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 936705
  • Archival Resource Key: ark:/67531/metadc898708

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  • August 22, 2006

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 9, 2016, 6:36 p.m.

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Chen, H; Shepherd, R; Chung, H K; Dyer, G; Faenov, A; Fournier, K B et al. Measurement of the relaxation time of hot electrons in laser-solid interaction at relativistic laser intensities, article, August 22, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc898708/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.